8 files changed, 56 insertions, 24 deletions
diff --git a/config/initializers/0_duplicate_migrations.rb b/config/initializers/0_duplicate_migrations.rb
index 194aff70c..6c45e4bd2 100644
--- a/config/initializers/0_duplicate_migrations.rb
+++ b/config/initializers/0_duplicate_migrations.rb
@@ -16,7 +16,7 @@ ALLOWED_DUPLICATES = [20180410220657, 20180831171112].freeze
 
 module ActiveRecord
   class Migrator
-    def self.new(direction, migrations, target_version = nil)
+    def self.new(direction, migrations, schema_migration, target_version = nil)
       migrated = Set.new(Base.connection.migration_context.get_all_versions)
 
       migrations.group_by(&:name).each do |name, duplicates|
@@ -34,7 +34,7 @@ module ActiveRecord
         end
       end
 
-      super(direction, migrations, target_version)
+      super(direction, migrations, schema_migration, target_version)
     end
   end
 
diff --git a/config/initializers/application_controller_renderer.rb b/config/initializers/application_controller_renderer.rb
index 51639b67a..89d2efab2 100644
--- a/config/initializers/application_controller_renderer.rb
+++ b/config/initializers/application_controller_renderer.rb
@@ -1,6 +1,8 @@
 # Be sure to restart your server when you modify this file.
 
-# ApplicationController.renderer.defaults.merge!(
-#   http_host: 'example.org',
-#   https: false
-# )
+# ActiveSupport::Reloader.to_prepare do
+#   ApplicationController.renderer.defaults.merge!(
+#     http_host: 'example.org',
+#     https: false
+#   )
+# end
diff --git a/config/initializers/backtrace_silencers.rb b/config/initializers/backtrace_silencers.rb
index 59385cdf3..33699c309 100644
--- a/config/initializers/backtrace_silencers.rb
+++ b/config/initializers/backtrace_silencers.rb
@@ -1,7 +1,8 @@
 # Be sure to restart your server when you modify this file.
 
 # You can add backtrace silencers for libraries that you're using but don't wish to see in your backtraces.
-# Rails.backtrace_cleaner.add_silencer { |line| line =~ /my_noisy_library/ }
+# Rails.backtrace_cleaner.add_silencer { |line| /my_noisy_library/.match?(line) }
 
-# You can also remove all the silencers if you're trying to debug a problem that might stem from framework code.
-# Rails.backtrace_cleaner.remove_silencers!
+# You can also remove all the silencers if you're trying to debug a problem that might stem from framework code
+# by setting BACKTRACE=1 before calling your invocation, like "BACKTRACE=1 ./bin/rails runner 'MyClass.perform'".
+Rails.backtrace_cleaner.remove_silencers! if ENV["BACKTRACE"]
diff --git a/config/initializers/content_security_policy.rb b/config/initializers/content_security_policy.rb
index a0d48eafd..4d5b8f6ef 100644
--- a/config/initializers/content_security_policy.rb
+++ b/config/initializers/content_security_policy.rb
@@ -51,17 +51,7 @@ end
 
 Rails.application.config.content_security_policy_nonce_generator = -> request { SecureRandom.base64(16) }
 
-# Monkey-patching Rails 5
-module ActionDispatch
-  class ContentSecurityPolicy
-    def nonce_directive?(directive)
-      directive == 'style-src'
-    end
-  end
-end
-
-# Rails 6 would require the following instead:
-# Rails.application.config.content_security_policy_nonce_directives = %w(style-src)
+Rails.application.config.content_security_policy_nonce_directives = %w(style-src)
 
 PgHero::HomeController.content_security_policy do |p|
   p.script_src :self, :unsafe_inline, assets_host
diff --git a/config/initializers/inflections.rb b/config/initializers/inflections.rb
index ebb7541eb..9bc9a54b2 100644
--- a/config/initializers/inflections.rb
+++ b/config/initializers/inflections.rb
@@ -20,6 +20,10 @@ ActiveSupport::Inflector.inflections(:en) do |inflect|
   inflect.acronym 'JsonLd'
   inflect.acronym 'NodeInfo'
   inflect.acronym 'Ed25519'
+  inflect.acronym 'TOC'
+  inflect.acronym 'RSS'
+  inflect.acronym 'REST'
+  inflect.acronym 'URL'
 
   inflect.singular 'data', 'data'
 end
diff --git a/config/initializers/permissions_policy.rb b/config/initializers/permissions_policy.rb
new file mode 100644
index 000000000..00f64d71b
--- /dev/null
+++ b/config/initializers/permissions_policy.rb
@@ -0,0 +1,11 @@
+# Define an application-wide HTTP permissions policy. For further
+# information see https://developers.google.com/web/updates/2018/06/feature-policy
+#
+# Rails.application.config.permissions_policy do |f|
+#   f.camera      :none
+#   f.gyroscope   :none
+#   f.microphone  :none
+#   f.usb         :none
+#   f.fullscreen  :self
+#   f.payment     :self, "https://secure.example.com"
+# end
diff --git a/config/initializers/preload_link_headers.rb b/config/initializers/preload_link_headers.rb
new file mode 100644
index 000000000..9f21c45ec
--- /dev/null
+++ b/config/initializers/preload_link_headers.rb
@@ -0,0 +1,8 @@
+# Since Rails 6.1, ActionView adds preload links for javascript files
+# in the Links header per default.
+
+# In our case, that will bloat headers too much and potentially cause
+# issues with reverse proxies. Furhermore, we don't need those links,
+# as we already output them as HTML link tags.
+
+Rails.application.config.action_view.preload_links_header = false
diff --git a/config/initializers/sidekiq.rb b/config/initializers/sidekiq.rb
index f2733562f..fc85a3913 100644
--- a/config/initializers/sidekiq.rb
+++ b/config/initializers/sidekiq.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 namespace    = ENV.fetch('REDIS_NAMESPACE') { nil }
-redis_params = { url: ENV['REDIS_URL'] }
+redis_params = { url: ENV['REDIS_URL'], driver: :hiredis }
 
 if namespace
   redis_params[:namespace] = namespace
@@ -14,14 +14,30 @@ Sidekiq.configure_server do |config|
     chain.add SidekiqErrorHandler
   end
 
-  config.death_handlers << lambda do |job, _ex|
-    digest = job['lock_digest']
-    SidekiqUniqueJobs::Digests.delete_by_digest(digest) if digest
+  config.server_middleware do |chain|
+    chain.add SidekiqUniqueJobs::Middleware::Server
+  end
+
+  config.client_middleware do |chain|
+    chain.add SidekiqUniqueJobs::Middleware::Client
   end
+
+  SidekiqUniqueJobs::Server.configure(config)
 end
 
 Sidekiq.configure_client do |config|
   config.redis = redis_params
+
+  config.client_middleware do |chain|
+    chain.add SidekiqUniqueJobs::Middleware::Client
+  end
 end
 
 Sidekiq.logger.level = ::Logger.const_get(ENV.fetch('RAILS_LOG_LEVEL', 'info').upcase.to_s)
+
+SidekiqUniqueJobs.configure do |config|
+  config.reaper          = :ruby
+  config.reaper_count    = 1000
+  config.reaper_interval = 600
+  config.reaper_timeout  = 150
+end